read()

fl::size fl::ByteStreamMemory::read ( fl::u8 * dst, fl::size bytesToRead )

overridevirtual

Implements fl::ByteStream.

Definition at line 20 of file bytestreammemory.cpp.

                                                           {
    if (!available(bytesToRead) || dst == nullptr) {
        FASTLED_WARN("ByteStreamMemory::read: !available(bytesToRead): "
                     << bytesToRead
                     << " mReadBuffer.size(): " << mReadBuffer.size());
        return 0;
    }
 
    fl::size actualBytesToRead = MIN(bytesToRead, mReadBuffer.size());
    fl::size bytesRead = 0;
 
    while (bytesRead < actualBytesToRead) {
        fl::u8 &b = dst[bytesRead];
        mReadBuffer.pop_front(&b);
        bytesRead++;
    }
 
    if (bytesRead == 0) {
        FASTLED_WARN("ByteStreamMemory::read: bytesRead == 0");
    }
 
    return bytesRead;
}

References fl::available(), FASTLED_WARN, MIN, and mReadBuffer.

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